I get missing meshes in the floor and walls of dragonsreach, bluepalace, and other palaces. Also, i get missing meshes in random dungeons too. I can in fact fall through the missing meshes. If i attempt to exit the place, i ctd. Anyone know why is this the case?

Note: Vanilla skyrim does not have this issue. I did use many mods. However, i figured out that it is WATER(mod) that caused it. But why?

Few dungeons mods (like wheeze dungeon pack) causes that after newest patch.

i dont use any dungeon mods, but i do use Skyrim HD Lite. Maybe thats the problem? Since Skyrim HD isnt updated for 1month

Erm...are you using Bethesda's HD texture patches in addition to this? That could be your issue right there; they aren't compatible. Or you could be suffering from RAM problems. If I were you, I'd run some tests on your rig to see if RAM could be a problem.

nope. NO gamesas HD pack. I run on Ingame High texture and previously on skyrim 2k HD.
Removing skyrim 2k HD does not seem to solve the problem. Though i dont get random CTDs(i still get, but much rarer) because i removed a conflict mod, i still get crashes(not ctd). And i seem to crash in the outside near water/trees. It is definitely not my ram/gpu so i suspect its 1.5.26 that is causing it. 1.4.21 is totally fine, never ctd nor crash. So yea..

This could have something to do with the 1.5.26 patch. they made changes to all of the water shaders. if the mod is trying to alter these there could be a conflict. lately it seems that no matter what order you put mods in. update.esp seems to take full rains over any mods. I could be wrong but each mod I used to use that 1.5 updates have broken seem to be the ones that change things that were updated in that patch. TESV.exe might be programmed to force update.esp i know you cant un select it or the game will hang right before the main screen.

ever since the latest update I get the purple texture glitch - things will be blue or purple then I CTD. I thought it might be a lack of memory problem, but I'm not really sure how that could be since I've been playing since release and only recently experienced this glitch.

I do appologeze because I do not remember what they called this glitch but it has to do with the same reason a few of us are having a serious shadow glitch. i'm pretty sure there is a fix for that out there but again I dont know what they called that glitch so you will have to search for it.

i've been looking around, a lot of people have it but few have reported a fix yet...

Aha!
So i knew it was the 1.5.26
Dam u gamesas, why r u making the game even worse
Now i cant use a single freaking HD pack and the vanilla skyrim is so dull.
wish i could just roll back to 1.4.21

They have their big important April surprise coming out - I wish they would just let us use the older version of the game that worked rather than whatever they're calling 1526